Design and experiment research of bend coaxial waveguide

A type of bend coaxial waveguide has been proposed. Its application background and principle were introduced, and the design and numerical simulation of a bend coaxial waveguide at the center frequency 4.0 GHz were conducted, as well as the experiment research. The experiment result indicates that, at the center frequency of 4.0 GHz, the loss is about 0.17 dB and the voltage standing wave ratio (VSWR) is about 1.20. In the range of 3.8 GHz to 4.2 GHz, the loss and the VSWR are below 0.20 dB and 1.25 respectively. The bend coaxial waveguide has the advantages of small volume, simple structure, no dielectric support and easy to machining, which can be applied to coaxial waveguide connection and bend in the feed network of high power microwave．